Anchor device to relieve tension from the rope socket prior to perforating a well

Abstract

An anchoring sub used in combination with hydrocarbon exploration and production tools, such as perforating guns and logging devices, within a wellbore. The anchor sub is reversible and includes a mandrel, a slip assembly and a slip cone, where the slip assembly selectively travels up and down the mandrel and is able to mate with the slip cone. The anchor sub secures itself to the inner circumference of a wellbore when the slip assembly is mated with the slip cone. Mating and de-mating of the slip assembly with the slip cone is accomplished by selective up and down movement of the anchor sub.

1. An anchoring device for use with a perforating gun within a wellbore, said anchoring device comprising:
 a mandrel disposed in a first position having a pattern formed on the outer surface of said mandrel; and 
 a slip assembly slideably positioned on said mandrel, 
 wherein selective disposition of said slip assembly with said pattern in an anchoring position anchors said anchoring device and wherein said pattern is configured to guide said slip assembly into a gun shock position during upward movement of the anchoring device, wherein the second position de-anchors said anchoring device, and said pattern is configured to automatically guide said slip assembly into another anchoring position upon the next downward movement of the anchoring device. 
 
   
   
     2. The anchoring device of  claim 1 , wherein said slip assembly anchors said anchoring device to the wellbore. 
   
   
     3. The anchoring device of  claim 1 , wherein said slip assembly automatically becomes selectively repositioned on said pattern with vertical movement of said anchoring device. 
   
   
     4. The anchoring device of  claim 1 , further comprising a slip cone disposed on said mandrel engageable by said slip assembly, such that by engaging said slip cone, said slip assembly is urged outward into anchoring contact with the wellbore. 
   
   
     5. The anchoring device of  claim 1  further comprising at least one drag slip disposed on said slip assembly, said drag slip contactable with the wellbore thereby providing a drag force onto said slip assembly when said anchoring device moves within the wellbore, where the drag force has a direction opposite to the direction of movement of said anchoring device. 
   
   
     6. The anchoring device of  claim 1 , wherein said mandrel is in a second position that is vertically reversed from said first position, wherein selective disposition of said slip assembly with said pattern anchors said anchoring device to the wellbore against movement opposite in direction to the movement anchored against in  claim 1 . 
   
   
     7. The anchoring device of  claim 1 , wherein said slip assembly is engageable with said pattern in an anchoring position, a shock position, a lowering position, and a raising position. 
   
   
     8. The anchoring device of  claim 7 , wherein said slip assembly anchors said anchoring device within the wellbore. 
   
   
     9. The anchoring device of  claim 7 , wherein when said slip assembly is engaged with said pattern in the shock position, said anchoring device is motivatable in a first vertical direction and limited in its movement in a second vertical direction. 
   
   
     10. The anchoring device of  claim 9 , wherein said anchoring device limits travel in the second vertical direction to less than 1 foot. 
   
   
     11. The anchoring device of  claim 9 , wherein said anchoring device limits travel in the second vertical direction to less than 8 inches. 
   
   
     12. The anchoring device of  claim 9 , wherein said first vertical direction is upward and said second vertical direction is downward. 
   
   
     13. The anchoring device of  claim 9 , wherein said first vertical direction is downward and said second vertical direction is upward. 
   
   
     14. The anchoring device of  claim 7 , wherein when said slip assembly is engaged with said pattern in the lowering position, said anchoring device is upwardly and downwardly motivatable. 
   
   
     15. The anchoring device of  claim 7 , wherein when said slip assembly is engaged with said pattern in the raising position, said anchoring device is upwardly and downwardly motivatable. 
   
   
     16. The anchoring device of  claim 1 , wherein said anchoring device vertically moves in a first direction and then vertically moves in a second direction prior to being re-anchored. 
   
   
     17. The anchoring device of  claim 16 , wherein the distance traveled during movement of said anchoring device in the second direction is less than the distance traveled during movement in the first direction. 
   
   
     18. The anchoring device of  claim 16 , wherein the movement of said anchoring device in the second direction is less than 1 foot. 
   
   
     19. The anchoring device of  claim 18  further wherein said slip assembly comprises at least one rocker slip engageable with the wellbore to provide anchoring contact with the wellbore. 
   
   
     20. The anchoring device of  claim 16 , wherein said vertical movement in a first direction comprises upward movement and said vertical movement in a second direction comprises downward movement. 
   
   
     21. The anchoring device of  claim 16 , wherein said vertical movement in a first direction comprises downward movement and said vertical movement in a second direction comprises upward movement. 
   
   
     22. The anchoring device of  claim 1  further comprising a pin connected to the slip assembly and formed for travel within the pattern, wherein the pattern comprises an upper section and a mid section, wherein the upper section includes substantially vertical slots each closed at the top that form the anchoring position, and wherein the vertical slots are open at the bottom, and wherein the mid section comprises raised portions having an “S” shaped profile on their respective upper ends that form the gun shock position, wherein the “S” shaped profile is formed to redirect the pin from one upper section vertical slot to an adjacent upper section vertical slot on an upward and subsequent downward movement of the anchoring device within the wellbore thereby automatically re-anchoring the device.